Apparatus for treating masonry surfaces



June 24, 1930. s. WERTZ APPARATUS FOR TREATING MASONRY SURFACES Filed Deo, 7, 1927 2 Sheets-Sheet l june 24, lg. 5 WER-rz l,766,419

APPARATUS FOR TREATING MASONRY SURFACES Filed Dec. 7, 192'? 2 sheets-sheet 2 0a/5 5. Merz 5y /my W Arae/VEK Patented June 24, 1930 UNITED STATES PATENT oFFIcE LOUIS S. WERTZ, OF SHAKER HEIGHTS, OHIO, ASSIGNOR TO THE lWIEIRTZ COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO APPARATUS FOR` TREATING- MASONRY SURFACES Application'led December 7, 1927. Serial No. 238,444.

bers, which are rotated in opposite directions simultaneously. Where the treatment consists only in smoothing the surface, and not primarily in repairing a defective structure, the abrading tools only are used, with or without a blast of air or water, as the conditions require; but where the treatment consists also in a repair operation, there is combined with the two series of oppositely moving treating members, means for applying repair material carried by a blast of air into and filling the voids and defective portions of the structure.

The invention also relates to material-feed ing apparatus of the character noted in which the repair material is projected from a nozzle through the body of the brushing and finishing member, and preferably centrally of said member, the latter being positioned outwardly of the projecting nozzle. The claims of this application are limited to apparatus designed both for projecting treating inaterial and for smoothing and finishing the masonry surface.

The annexed drawings and the following description set forthl in detail certain means embodying my improved treating apparatus` such means constituting, however, but two o the forms in which the apparatus may be illustrated.

In said annexed drawings:

Figure 1 is a vertical axial section of one form of my improved apparatus, Ia fragmentary portion of a conventlonal manually-controlled pneumatic tool adapted to carry repair material under pressure being also shown;

as also a fragmentary portion of a motor for driving my improved brush construction;

` Figure 2 is a vertical transverse section,

taken in the Figure l;

Figure 3 is an end View, taken in the plane indicated by the line 3 3, Figure l; and

Figure 4 is a partial vertical axial section, and partial side elevation, of a second form of my improved apparatus designed for smoothing a masonry surface and not intended also for a repair operation.

Referring, to theV annexed drawings in which the same parts vare indicated by the same respective ordinals in the several views, and particularly describing first that form of apparatus shown in Figures 1, 2 and 3, a masonry wall l is lshown which has a defective portion consisting of voids 2 which have been lled by a blast of repair material 3 projected from the nozzle opening 42 and carried by air pressure, the surface of the wall subsequent to such filling of the voids being scrubbed under pressure by two concentric annular brushes 7 and 8, through a central open area of which the blast 3 is projected. I direct attention to the fact that some ofy these voids 4 have hidden pocket portions extending in one direction from the axial line of the void and other of the voids 5 have such hidden pocket portions extending in the opposite direction from their axes, while some of such voids 6 have these pocliets extending in both directions from their axes. One purpose of the double series of brushes is to assure the proper working of the repair material into planes indicated by the line 2-2,

such pockets, irrespective of the shape of they pockets.I In addition to providing a construction which is well-balanced and thus more easily handled when being moved comparatively rapidly parallel with the wall so as to produce a comparatively large' volumeA of work, the feed of the repair material centrally of the concentric annular brushes 7 and 8 also helps in completely filling all the wall voids by reason of the symmetrically outwardly ared discharge Vfrom thecentral nozzle 42. Certain voids 2 are shown at the bottom and top of the structure 1 which have not as yet beeln filled by the blast 3 of the repair materia The means for furnishing and applying the blast 3 and for operating the brushes 7 and 8 will now be described. The brush 7 is secured to a iiange 9 formed upon a tubular brush holder 9 and the brush 8 is secured to a iange 10 surroundin the iiange 9 and formed upon a tubular rush holder 10 surrounding and running u on the outer surface of the brush holder 9 y means of ball bearings 22. Mounted upon a casing 18 is a motor 11 to whose shaft 12 is secured a pinion 13 engaging a. pinion 14 which in turn engages a gear 15 secured to the brush holder 9. Also secured to the motor shaft 12 is a pinion 16 en aging a gear 17 secured to the brush holerli). This drive rotates brush holders 9 Vand 10 in opposite directions. A plate 20 covers the front of the casing 18. Ball bearings 21, 23 and 24 are provided, respectively, for the motor shaft 12, the movement of the brush holder 10 within the casing 18, and the movement of thebrush holder 9 within the cover 20. A flange 20 of the cover 20 is formed with an internally-threaded portion 25 adapted to engage an externallythreaded end-thickened portion 26 of a shell 26 extended forwardly within the brush holder 9 to a point somewhat short of the plane of the ange 9. The portion 26 of the shell 26 has an internally-threaded portion 27 adapted to cooperate with a second shell 28, formin a nozzle body, and having threaded to its orward end a nozzle 29. Threaded into the other end of this nozzle body 28 is a plugl30 Jformed with a tapering coupling member 30 communicating with or preferably integral. with a conduit 31 through which repair material may be fed into the coupling member 30. This coupling member. 30 is adapted to be connected with the discharge spout 32 of any standard pneumatic power machine whereby under manual control, air at a desired pressure can be forced through the nozzle body 28. The material which enters by the pipe 31 is fed into a tubular pipe 33 having a passage 37 communicating with the pipe 31 at one end within the coupling member 30 and communicating with the interior ofl the nozzle 29, at the other end, this pipe 33 being formed with an enlarged portion 34 forming a support for one end of the pipe 33 in the nozzle body 28, the nozzle end of the pipe 33 being supported by the enlarged portion 34', the enlarged portion 34 being provided with air passages 35 leading into the nozzle clambera36, and the enlarged portion 34 with air passages 35 leading into the eX- treme inner end ofthe nozzle 29 adjacently the discharge end of the material feed tube 33. As is well known in the art, these pneumatic power devices -are under inger control, the

materialand air sometimes being separately controlled and sometimes jointly controlled, in the latter case the first portion of the trigger stroke opening up the air valve and the latter portion of the stroke gradually opening up the material valve, so as to enable the air under strong pressure to pick up and carry the material forwardly and discharge the same in a blast from the nozzle 29. The eEect of this action, as applied to my device, is to positively till the voids2 of the structure 1 with the repair material. The latter is in a liguid or soupy condition so as to conpletely ll these voids, the repairingbein completed by the rotation of the brushes and 8 in opposite directions so as to press and retain the material into the voids and to' smooth off the wall surface and eiect a thor ough and sightly repair job. The oppositely rotating brushes 7 and 8 serve another function, in addition to the thorou h repairing and nishing, and that is their re ative speeds may be so regulated by suitably selected gears as to eliminate any torque which would render diiiicult or impossible the a plication of a single brush, particularly i 1t were desired to apply the brush flat to the wall 1 instead of workin the brush at an angle or upon a brush e ge, as is customary in the art when using a single brush. Two hundred revolutions per minute and four hundred revolutions per minute are practical working speeds for the brushes 8 and 7, respectively. I provide flexible supporting means for permitting theperation of this device without the necessity of the operators sustainin the weight thereof, and the same consist o an ear 39 formed upon the intermediate portion' 38 of the casing 18 and a clevis 40 of a rope 41 linked to the ear 39 and passing over any suitable movable support to follow the movement of the machine, a counterweight being provided for balancing the weight of the machine if desired. A protective shield to eliminate spattering of the repair material is afforded by the meniber 50 secured by the same bolts which clamp an end casing member 19 to the main casing member 18.

Inasmuch as the matter of weight is an 1mportant practical consideration in the operation of tools of this character, particularly from the standpoint of the operators ability to stand-up for any considerable time under the eiort necessary to move the tool rapidly from an inconvenient position over a vertical wall, the smoothing and nishing brushes oftentimes consist simply of two brush sections rotated in opposite directions, or even one brush or brush section,\this simplification of the brushing medium resulting directly and indirectly in greatly lightening the weight of the complete tool. In the case of using simply a single brush or a single brush section, the diculties usually attendant upon the use of such a brushing and smoothing medium are considerably alleviated in my construction, by the fact that the treating material is projected through the body of the brush, and preferably centrally of the latter.

Referring to the form of device shown in Figure 4, the same is designed for smoothing a wall, such as a marble structure 43. This structure is shown as having a surface formed with holes and protuberances 44 which it is desired to smooth off by the operation of my device and its oppositely rotating air tools 45 and-46. These abrading tools 45 and 46 are mounted in the flanges 47 and 48 of tool holders 47 and 48 respectively and the actuation of the tools is similar to that described with reference to the brushes 7 and 8 of Figure 1. If desired, a blast 53 of air or water is projected from the nozzle 29 from .a source 52 controlled by a valve 51 and connected to the abrading device by means of a coupling 49. Different surface portions of the structure 43 are shown in different conditions, a finished portion being denoted by the ordinal 54, a partially finished portion by the ordinal 55, which has been subjected to the action of the lower portion of the abrading tools, and a portion 56 upon which the outer tool 46 is just commencing to work, the direction of movement of the tool being indicated by the arrow shown upon the drive casing 18.

The two concentric rotary brushes 7 and 8 are illustrative only, since it is possible, within the spirit of the invention, to use a larger number of said brushes or brush sections; furthermore, the brushes or brush sections may be reciprocated by suitable mechanism in opposite directions simultaneously instead of being rotated as hereinbefore described in detail and as shown in that embodiment of the invention which appears in the accom panying drawings.

What I claim is Y 1. Means for treating masonry walls comprising, a nozzle; means furnishing treating material thereto under air pressure; brush sections positioned outwardly of said nozzle, the blast from the latter centrally intersecting the brush sections; and means for moving a part of said brush sections in one direction and the balance of said brush sections in the opposite direction.

2. Means for treating masonry walls comprising, a nozzle; means furnishing treating material thereto under air pressure; an annular brush` positioned outwardly of said nozzle and centrally intersected by the blast from the latter; a second annular brush concentric with said first-mentioned brush; and means for rotating said brushes in opposite directions.

3. Means for treating masonry Walls comprising, a nozzle; means furnishing treating material theretounder air pressure; a pair of independent concentric brushes; means permitting the passage of a blast from said nozzle through the body of said brushes and outwardly therefrom; and means for rotating said brushes in opposite directions.

4. Means for treating masonry walls comprising, a casing; a nozzle mounted therein;

means for furnishing air under .pressure to said nozzle; means for feeding treating material into said air-furnishing means; driving means; a pair of brush holders supported upon said casing; means for rotating said brush holders in opposite directions from said driving means, said brush holders extending forwardly of and symmetrically around said nozzle; and a pair of annular concentric brushes secured to the respective forward ends of said brush holders.

A5. Means for treating masonry walls comprising, a nozzle; means furnishing treating material thereto under pressure; brush sections positioned outwardly of said nozzle, the blast from the latter centrally intersecting the brush sections; and means for moving a part of said brush sections in one direction and the balance of said brush sections in the opposite direction.

6. Means for treating masonry walls com- 'prising, a nozzle; means furnishing treating material thereto under pressure; an annular brush positioned outwardly of said nozzle and centrally intersected by the blast from the latter; a second annular brush concentric with said first-mentioned brush; and means for rotating said brushes in opposite directions.

Signed by me this 1 day of Dec., 1927.

LOUIS S. WERTZ. 

